Siglum: 
I-VCd CLXX
Liturgical occasions: 
Ff. 1-3v Incomplete Kalendar (from the 1th March to 31th August).
Description: 

Early 13th century Breviary (pars hyemalis) written in Arras, for the St. James chapel in Namur (dioc. Liege). The manuscript trasmits the Historia of St. Vedastus bishop of Arras (LMLO V11), here adapted to the secular cursus. The proper offices for Matthas (LMLO MG 21) and Maximinus indicate an influence from Trier. Furthermore the Breviary is the oldest source for the Historia sanctae Katherinae "Gratulemur in honore Katherinae" (LMLO CB 29). Evolved Lorrain notation on four red line staff. Cathedral cursus.
The differentiae of each mode have been numbered with a two-digit system: an upper-case letter indicating the final pitch of the differentia and a sequentially ordered numeral.

Selected bibliography: 

Pasté, Romualdo. Inventario dei manoscritti dell’Archivio Capitolare di Vercelli. Firenze 1924, p. 46.

Quazza, Ada. Castronovo, Simonetta. Biblioteche e libri miniati in Piemonte tra la fine del XII e il primo terzo del XIV secolo: alcuni percorsi possibili, in Romano (ed.). Torino 1992, pp. 268-270.

Full source / fragment: 
Complete